Hi,
I cannot understand a difference in size I can see on an old Debian 5.0
machine, maybe I'm just missing something obvious.
/dev/sdd is partitioned as follows, and /dev/sdf is exactly the same:
#>fdisk -l /dev/sdd
Disk /dev/sdd: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000901d8
Device Boot Start End Blocks Id System
/dev/sdd1 1 24 192748+ 83 Linux
/dev/sdd2 25 60801 488191252+ 5 Extended
/dev/sdd5 25 632 4883728+ 83 Linux
/dev/sdd6 633 2982 18876343+ 83 Linux
/dev/sdd7 2983 4199 9775521 83 Linux
/dev/sdd8 4200 4807 4883728+ 83 Linux
/dev/sdd9 4808 5173 2939863+ 82 Linux swap / Solaris
/dev/sdd10 5174 31281 209712478+ 83 Linux
You can see that sdd6 is twice the size of sdd7.
cfdisk reports sizes of around 20 GB and 10 GB:
sdd6 -> 19329.41
sdd7 -> 10010.17
All partitions in these two identical drives are configured as RAID 1
using mdadm, but the md devices associated to sdd6/sdf6 and sdd7/sdf7
are both reported to be 10 GB in size, as can be seen from the mdadm
output below.
Why?
Thanks for any info.
#>mdadm -vv --detail /dev/md2
/dev/md2:
Version : 00.90
Creation Time : Thu Feb 22 16:18:11 2007
Raid Level : raid1
Array Size : 9767424 (9.31 GiB 10.00 GB)
Used Dev Size : 9767424 (9.31 GiB 10.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Mon Nov 23 14:19:23 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 5582dad7:7ac89883:0c2b9e1d:5009dd35
Events : 0.69228
Number Major Minor RaidDevice State
0 8 54 0 active sync /dev/sdd6
1 8 86 1 active sync /dev/sdf6
#>mdadm -vv --detail /dev/md3
/dev/md3:
Version : 00.90
Creation Time : Thu Feb 22 16:18:54 2007
Raid Level : raid1
Array Size : 9767424 (9.31 GiB 10.00 GB)
Used Dev Size : 9767424 (9.31 GiB 10.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Mon Nov 23 14:19:27 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : e44836cf:6340f7fa:52fb3562:a78d4dbb
Events : 0.187630
Number Major Minor RaidDevice State
0 8 55 0 active sync /dev/sdd7
1 8 87 1 active sync /dev/sdf7
--
Ciao,
Marco.
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